EDUCATION (CBSE/UGC NET)

Detailed explanation-1: -To arrive at the more than 100 billion neurons that are the normal complement of a newborn baby, the brain must grow at the rate of about 250, 000 nerve cells per minute, on average, throughout the course of pregnancy.

Detailed explanation-2: -At birth, the average baby’s brain is about a quarter of the size of the average adult brain. Incredibly, it doubles in size in the first year. It keeps growing to about 80% of adult size by age 3 and 90% – nearly full grown – by age 5.

Detailed explanation-3: -The brain can make thousands of new neurons every day and maintains this ability well into old age. By the time you turn 50, you will have replaced the original neurons in your hippocampus, your brain’s “memory center, ” with all new neurons!

Detailed explanation-4: -Recent studies have shown that the brain produces new cells (as many as 1500 new neurons every day in the dentate gyrus of the hippocampus). In a healthy brain, neurogenesis occurs frequently, especially in the hippocampus.

Detailed explanation-5: -The average adult human has about 100 billion brain cells. About 85, 000 brain cells die each day. Approximately 1, 400 new brain cells are produced each day.